Tailoring the Anomalous Nernst Effect of Co/Pt Multilayers Grown on Strained Flexible Substrates

ABSTRACT This work investigates the impact of in‐plane strain on the Anomalous Nernst Effect (ANE) of Co/Pt multilayers deposited on polyimide. Strain is introduced directly into the growing films by bending the substrates during deposition. ANE measurements exhibit an asymmetric response, increasing by over 30% under compression while decreasing under tension. Hall effect measurements reveal a similar asymmetric trend in transversal resistivity (ρ xy ), whereas longitudinal resistivity (ρ xx ) rises symmetrically (up to ∼200%), indicating that anomalous transport is decoupled from general carrier scattering. While the increase in ρ xx is dominated by extrinsic scattering, such as defects or grain boundaries formed during substrate relaxation, the ANE response is governed by intrinsic interface modifications. Specifically, compression enhances interfacial scattering efficiency by reducing Co–Pt spacing and strengthening spin–orbit coupling, whereas the tensile tension degrades the ANE response. These findings demonstrate that strain engineering is a powerful tool to tune the thermomagnetic and transport properties of magnetic multilayers, leading to significant efficiency enhancements in spintronic systems.